1 files changed, 48 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_console_clear_cache.js b/devtools/client/webconsole/test/browser/browser_console_clear_cache.js
new file mode 100644
index 0000000000..8fc536e67a
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_console_clear_cache.js
@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Check that clearing the browser console output also clears the console cache.
+
+"use strict";
+
+const TEST_URI =
+  "data:text/html;charset=utf8,<!DOCTYPE html>Test browser console clear cache";
+
+add_task(async function () {
+  await pushPref("devtools.browsertoolbox.scope", "everything");
+
+  await addTab(TEST_URI);
+  let hud = await BrowserConsoleManager.toggleBrowserConsole();
+
+  const CACHED_MESSAGE = "CACHED_MESSAGE";
+  await logTextInContentAndWaitForMessage(hud, CACHED_MESSAGE);
+
+  info("Click the clear output button");
+  const onBrowserConsoleOutputCleared = waitFor(
+    () => !findConsoleAPIMessage(hud, CACHED_MESSAGE)
+  );
+  hud.ui.window.document.querySelector(".devtools-clear-icon").click();
+  await onBrowserConsoleOutputCleared;
+  ok(true, "Message was cleared");
+
+  info("Close and re-open the browser console");
+  await safeCloseBrowserConsole();
+  hud = await BrowserConsoleManager.toggleBrowserConsole();
+
+  info("Log a smoke message in order to know that the console is ready");
+  await logTextInContentAndWaitForMessage(hud, "Smoke message");
+  is(
+    findConsoleAPIMessage(hud, CACHED_MESSAGE),
+    undefined,
+    "The cached message is not visible anymore"
+  );
+});
+
+function logTextInContentAndWaitForMessage(hud, text) {
+  const onMessage = waitForMessageByType(hud, text, ".console-api");
+  SpecialPowers.spawn(gBrowser.selectedBrowser, [text], function (str) {
+    content.wrappedJSObject.console.log(str);
+  });
+  return onMessage;
+}